Book ReviewsLeslie Umberger, with contributions by, Erika Doss, Ruth DeYoung Kohler, Lisa Stone, and Jane Bianco. Sublime Spaces and Visionary Worlds: Built Environments of Vernacular Artists. New York/Sheboygan, WI: Princeton Architectural Press/John Michael Kohler Arts Center, 2007. 427 pp.; 650 color and 100 black‐and‐white illustrations, bibliography. $65.00.